Adapter with swivel joint



Oct. 21, 1947. R. F. BANNOW I ADAPTER WITH SWIVEL JOINT Original Filed March 20, 1943 ATTORNEY Reissued Oct. 21, 1947 IT E D "STATES PATENT 'I' C -E ADAPTER WITH SWIVEL ,RudolphE. Bannow, Easton, Conn.

Original No. 2,404,561, dated July 23,1946, "Serial Nat 179,836, March 20, 1943. .Applicationrfor .zreissue August 6, .1947, Serial No. 766,660

Claims.

This invention relates to .adjustably jointed structures for ;-'mo.unting-a, portable self-powered works-machining unit Withits cutting or abrading .tool ,upon some suitable projecting frame support. .overarm that projects from the standard of a floor type of millingmachine. Amachinetool of this type iusually incorporates a movable table equipped to hold the .workfirml-y in different positions while being machined .by-the cutting tool.

An articulated holding structure-for this general purpose is disclosed in my United States Patent No. 2,225,291 wherein the self-powered work machining unit comprises a milling attachment incorporating arotary cutter. A similar use for like holding structure, but wherein the -self-pow- .ered work-machining .unit incorporates a length- :wise reciprocative cutter such as a file, slotter or breach, is disclosedin an application copending herewith, Serial No. 474,650, filed February 4,

As proposed for use with each of the foregoing articulated holding structures the horizontal overarm of the milling machine has been capable of being adjustably turned upon its longitudinal axisin relation to the machine frame-or standard by which it is supported. In some cases however this *overarm, or the equivalent projecting primary means of support for the self powered machining unit, may not be capable of rotary adjustment about its 'own axis relative to the ma- :chine frame. Where this condition has been ,present in former cases, it has undesirably re duced the number of angular-directions in which the work cutting toolcan be inclined while operating-on the work.

.One object of the present improvements is to provide an adjustably jointed supporting structure which will compensate for inability of the .overarmto .be adjusted rotatably or to measurable degrees about its own longitudinal axis so that there is preserved .or restored to the cutting tool as many possible angles of operating inclina- -.t ion as :is possible ;to a self-powered machining ,unit supported upon a-rotatable overarm.

.A iurther object of the present improvements is to permit the self-powered machining unit at times to be bodily-shifted lengthwise of the overarm in cases where the latter is not itself longitudinallyslidable with respect to the machine .frame from which it projects.

Another object of .the invention is to support a lselfepowered machining unit on the end of a horizontal ,overarm that is fully cylindrical throughout its entire length, yet in a manner The support may constitute the horizontal I2 enabling the machining unit to be .swung bodily about a hinge axi perpendicularly related-to the longitudinal axis'of the overarm Additional advantages may arise if the hinge axis is arranged actually to intersect the overarm axis.

Another object is to, so mount the said machining unit that it can swivel relative to the overarm in a'plane parallel with the aforesaid hinge axis whilesuch hinge axis-remains fixed with re .spect to theloverarm and also while the axis about which said unit swivels aligns or is coincident with .theaxis ofthe overarm Aiurther object is to firmly establish positions for the machinin unit as a wholeat opposite extremes-of its 90 degree range of swinging movement about the said hinge axis relative to the over-arm.

A further object is to effect; swiveling adjustment of the machining unit as a whole by means of gear tootheddevices which shall at all times serveto relieve the operator of the necessity for manually supporting any heavily weighted, offcenter portions of the machining unit While its bodily position is being readjusted.

A further object is to provide a novelly constructed hinge bracket so jointed that two relatively .swingable sections thereof are so related that one of-said sections can be freed and turned ,adjiistably about the longitudinal axis of the overarm as well as freed to-slide lengthwise on the latter; and the other of said sections can support the machining unit in a manner enabling the latter to swivel adjustably with respect to it.

A -stil-1;f urther object is to combine with more than ordinary compactness and within a unitary section of a jointed support structure, a kind of removable trunnion that shall afford swivel support for a self-powered machining unit, together with transmission gearing that shall be operative to eiiect and maintain changes in the bodily positioning of the machining unit.

'The foregoing and other'related objectives will appear in greater particular from the following description of a preferred embodiment of the inventionselected from numerous possible forms of the present improvements for illustrative purposes only,'-an d iiiwhichdescription reference is made to the accompanying drawing wherein:

Fig. Us a plan view of a complete machine tool of ithefloor standard type incorporating a slotting attachment supported thereonthrough the medium of a jointed anglebracket embodying the present improvements. I

Fig. 2 is a fragmentary view of the same ma Fig. 4 is a plan view of the bracket sections of Fig. 3 established at one extreme of their range of adjustive movement opposite to that position shown in full lines in Fig. 1 and whichserves to bring the self powered machining unit into its broken line position in Fig. l.

Fig. 5 is a viewtaken in section, on the plane 55 in Fig. 4 looking in the direction of the arrows.

Fig. 6 is a view taken in section on the plane 66 in Fig. 5 showing only the overarm embracing section of the hinge bracket.

Fig. 7 is a fragmentary plan view taken in section on the planes 'l'| in Fig, 5 looking in the direction of the arrows.

Conventional parts of a. milling machine type of machine tool are indicated in Figs. 1 and 2 comprising the floor base Ill, the frame standard H and a movable work holding table l2 which can be shifted vertically by the usual screw handle l3, as well as backward and forward by the usual screw handle l4, and also side to side by the usual screw handle 15. The turret 22 is securable on top of frame standard I I in any position to which it may be turned about a vertical axis by tightening nuts 28 on the ends of clamp bolts 21 in the niches l6. These and other details of the main machine may be constructed as fully disclosed in my aforesaid United States Patent No. 2,275,291.

As further disclosed in said patent the turret head 22 is hallow and provides rotary bearings which also serve as slide bearings in which is slidably journaled a sturdy elongated overarm 34. According to the present improvements this overarm may be cylindrical throughout its entire length. The overarm is rotatable through 360 angular degrees of turning in its said bearings as well as slidable lengthwise therein. The crown wall 35 of the turret contains a split disposed lengthwise of the overarm which enables its side halves to be sprung toward each other by means of draw bolt handles 31 thereby to clamp and hold the overarm immovable. However there may be mechanism onthe inside of the particular turret 22 here disclosed which could be constructed and operated by hand wheel 56 as disclosed in my aforesaid Patent 2,275,291 for rotating overarm 34 about its own longitudinal axis while permitting the overarm to be shifted horizontally lengthwise of the turret to any desired extent wlien handles 31 are turned to loosen their draw bo ts.

The work machining unit or attachment herein chosen as illustrative of any portable self-powered machining unit may be constructed like that disclosed in copending application, Serial No. 474,650. It will suffice here to explain that this machining unit will ordinarily include a main body portion such as crank case 86 in which there may be guided lengthwisethe shank llll of a tool holder I02 carrying a broach. Her other form of Work cutting tool adapted to be reciprocated lengthwise by the running of power motor 99 and preferably at various speeds determined by a variable speed power transmission such as ste ped pulleys housed within casing H9. The foregoing and other details of the possible construction and operation of a self-powered machining unit will be found in the aforesaid copending application Serial No. 474,650. Its operation enables a work piece held on table I2 to be out while the axis of the tool is disposed in any desired location relative to the Work as Well as while the tool axis is disposed at any desired angle to the work. A milling attachment like that disclosed in my aforesaid patent may take the place of or be used in conjunction with the slotting attachment above described as fully appears in the disclosure of the said copending application.

The portion of the work machining unit, whether it be a slotting attachment or a milling attachment, which is of most concern to the present improvements consists of a circular mounting flange 98 presenting a flat face laterally of crank case 86 penetrated by tightening bolts 96 of which there may be four equally spaced about a circle near the periphery of mounting boss 98 as shown in Fig. 7. The otherwise flat face of circular flange 98 may be centrally recessed at 90 for receiving and locating fixedly thereon the end of the journal forming shank of a stub-shaft or trunnion 85 snugly fitting recess 90. This trunnion has a thrust aflording head 88 of enlarged diameter and is detachably held to crank case 86 by holding screws 81. The shank of trunnion 85 is journaled in a central bore 84 in one swingable section of my improved jointed hinge bracket, which section I shall refer to as yoke section 16. Bore 84 is counterbored to accommodate the trunnion head 88. The foregoing construction is shown most clearly in Figs. 3 to 6; inclusive.

The journaled periphery of trunnion 85 has sunken gear teeth 9l cut into it all the way around to form in effect a worm Wheel. These sunken gear teeth 9| are in mesh with a worm 92 fixed on a cross shaft 93. As best shown in Fig. 7, shaft 93 has one end journaled directly in the structure of yoke 15 and has its other end journaled in an externally threaded bushing [4 larger in diameter than worm 92 and removably lodged in the structure of yoke 16. Shaft 93 carries at each of its ends outside of the yoke structure the squared terminals 94 to which may be applied a removable handle or Wrench (not shown herein) for turning the shaft 93 and hence worm 92. There may be a scale of angle measuring graduations 83 on the periphery of yoke section and there may be an index or zero mark with suitable Vernier or other indicia on the periphery of the mounting flange 98 of the machining unit to accord with such graduations for determining the angular extent of swiveling movement of the machining unit relative to yoke section I6.

For firmly holding these two parts together in every swiveled relationship to which they may be turned, there is sunken in the flat face of mounting flange 16 an annular slot 95 of T-shape cross-section which accommodates the square heads of clamp bolts 96 Whose threaded ends project forward and out of the mounting flange 98 of crank case 86 and thereat take tightening nuts 91. I

The collar section 15 of the improved jointed angle bracket occupies the space between the top arm is and the bottom arm of yoke section E6 and is of hollow block-like nature bored to fit and adjustably embrace the fully cylindrical end of overarm 34. A mean portion of collar section 15 is bored oversize at '13 to avoid having to nicely finish a needless extent of bearing surcases face for "contactwith the: peripher of the overarm. "The wall 'of l is split at ll-an'd provided with lugs to receive two tightening bolts I Tl which pass through clearance holes" in the lug threaded engagement with hardened threaded bushings 82 lod'g'ediminovably in section Thrust washers flc'separate the heads of hinge bolts 81 from raised faces of bosses borderin around slots 1'! and T8"on the outer surfacesof yoke arms 19 and 80.

"Further'features of construction of the'jointed angle support bracket consist in the following. Fig. 1 shows that the smoothly finished flat-faced crotch of yoke section 16 is seated firmly in surface contact with the smooth flat-faced end 58- of collar section I5. The exterior of thiscollar section, on'the opposite side of overarm 34 from lugs 69' and split 12, is provided with three-spaced seating padso'r bosses 65-, B6 and 61in triangular relationship whose'fiat faces are coplanar and aflford' three-point seating abutment for'the flat crotch face of yokesect'ion lfiwhen' the latter is positioned-as in Figs. 4 and 5. The flat face" of section end 68' atone time, and the coplanar bosses 65, 56, 6'! at another time, firmly and definitely establish the self-powered machining unit atthe opposite limits of its exactly ninety degree range ofswinging movement about the common axisof hinge bolts 81-. This axi preferably intersects the longitudinal axis of overarm 34 and is'perp'endicular thereto; On the top-and bottom extenor of collar'section there are provided-annular thrust surfaces 64 raised in relief and finished flat and smooth to swivel in contact with the flat smooth inside surfaces of yoke arms 79 and 80, respectively.

Figs. 3 and5 show that" the flat crotch surface which'faces seating pads 65, 66 and E1 is conc'a'vely hollowed out at '63 to clear the rounded convex exterior of collar section 15 which bulges outward somewhat between IOWEr'sBating pad 61 and upper seating pads 65, 65. Fig. 3 shows that the elongated slot H permits pulling the yoke section away from concentric relation-tothe collar section far enough to permit hollow E3 to clear the outer corner of the collar section while swinging the yoke section-past it about thehinge bolts 81. Greater compactness of the jointed hinge bracket as a whole is thus made possible and less size and weight of material is requiredin its construction without sacrificing strength; than would be the case ifyoke section- 1'6 were limited to swinging about a fixed hinge axis.

Themanner of operating the improved jointed attachmentstructurein a manner to incline the longitudinal axis or thestroking direction, of the cutting tool 6| into any angular relationship of the work will for the most part be obvious from the. foregoing description. Ordinarilythe work table [2 will be set in lower position relative to the cutting tool Bl by means of handles I3, I! than is shown in Fig. 2',- this View being verticalliy con-' tracted to save spacein the' drawing. In the 6 cataract sHoWn -in Figs; 1- and? the tool H def r H r at tfie r s own in mu lines.

o'r-a't' tire-broken line location or" sii'clitoo'l'which is attained b'y adjustively shifting "yoke section 1-5- and its'c rid-worli rnachih'ingunit to broken line'- s dohe' by looseningtne hinge bolts 8 [so the yoke section may be shifted radialiycutward snd swu'ng past the'corner of the I collar section 15 as indicated in Fig. 3. Either line--01 the broken line'posit-io'n "in 1-,16rarfl9'zis'16bodily'rriay-be swiveled about trunnionssana carry the axis of bil desired angle of inclination ih I i'k Thesetwo n'ieans of ad J' iis'tirierit couples withfth'e ability 'of the collar axis of Well to Slide ler'fgth'wi se thereof Whenfastening belts H are loose d -giv'es to anys'elhpcwerm machining unit-supported b'yrnansof m ifil provedjointe'd hinge bracket full ability to its locatedand-inclined in as m'any different was-sand: posit io" can be loca'ted' anddisposed the se'lf-povv'fed machining unit (if the aforesaid patent suspending: application ev'eii if't'lie overar'mbA itself be i eratively fiiid iii turret Z2.- Itis or course understood that afterany adjustiv's shifting of th'e pos'it'iori of the machining unit;- all holding bolts will lie-thoroughly retightened to prevent 'accidental dist1irb'ajfoc'e'ofthe" thus estab' lished; pos'iticnof" the machining it.- The turning" ofcrank case BB relative" to he'yok'e' sect 16 by means crwormsaanswer-m gears! will at'all' times relieve thei operator from having forcefully to lift or supportanyhe'avy part of the machining-unit"thatl'iangs off balancseven t'liough"i'etaihing nuts 91 are loosened; in the appended claims: the face of flange 53 is's'ometimes referred-to as a mounting face while the flangedike" head of yoke section i6 is referred t'o-as a head wall presenting a swivel seat for mating contact with such mounting face of flange-98a 'Whiie as herein she-w n, the 'projected' arii's of trunnion Bile coincident with the axis" of over-- arm 34 in Fig.2; these aX'es some to advantage for some' purp'oses" be's'o'related-th'at one is inec centnic relation to the othenin which case the crank ease 86in Fig. 2 wou1d be adjusted about a differen't center whenffaineflfli's' swiveled in relat on'tc'yoke section Tainan when-collar section 15 is rotated about'overa-rm 34. A greater variety of possible positionsfcr the Self poW'eled machining unit results. othermodifications of the pre'ciseshape's, sizes and relationships of the structures liere disclosed will be recognized as" possible of incorporating: the useful principles ofthis invention. Hence the patent to be granted will-beu'rid'erstodd as contempiating and intending to" cover all variations ofand substitutes-for cnie' fairly within the broadest reasonable inter; press-non" citric-claims.

1; claim 1. The combination with a machine attachliaving ala orally disposed mountingface said-attachment maybe sup-- purses adj stable posit-ions of, a supporting"- g' h ad wall presenting "a v g' cont'act'with sammou tmg: e' and costar ng ab'earin'g'hole, a c'entral'foi -ti g' facefa trunnion received in a A said recess and joufnal'ed iri said ng liole and having worm wheel teeth fadlalliwithin tlie' cempass o'ftlie journ'alcd Sui-1 face of said trunnion, holding bolts penetrating said trunnion having threaded engagement with said machine attachment, said trunnion being shaped to prevent separation of said mounting face from said swivel seat, a worm in mesh with said teeth rotatably carried by said supporting bracket, and means releasably to lock said machine attachment against swiveling movement about said trunnion relative to said supporting bracket. l

2. The combination with a machine attachment having a laterally disposed mounting face by means of which said attachment may be supported in adjustable positions of, a supporting bracket including a head wall presenting a swivel seatfor mating contact with said mounting face and containing a bearing hole, a central recess in said mounting face, a trunnion received in and snugly fitting said recess journaled in said bearing hole and having worm wheel teeth radially Within the compass of the journaled surface of said trunnion, holding bolts penetrating said trunnion having threaded engagement with said machine attachment, a shoulder on said trunnion preventing separation of said mounting face from said swivel seat, a worm in mesh with said teeth rotatably carried by said supporting bracket, an annular anchorage groove sunk in said swivel seat, tightening bolts penetrating said mounting face having flatted heads occupying and prevented from turning by said anchorage groove, and manually accessible nuts on said bolts at the exterior of said machine attachment.

3. The combination with a cylindrical machine overarm and a machine attachment having a laterally disposed mounting face by means of which said attachment may be supported in adjustable positions on said overarm of, a supporting bracket including a head wall presenting a swivel seat for mating contact with said mounting face and having two spaced hinge arms forking from said wall in a direction away from said mounting face, said wall containing a bearing bore opening into the space between said hinge arms, a trunnion in fixed relation to said mounting face journaled in said bearing bore, means to prevent separation of said head wall from said swivel seat, means releasably to lock said machine attachment against swiveling movement with said trunnion relative to said supporting bracket, a collar section turnably sleeved on said overarm comprising a hollow block like body straddled by said hinge arms, and pivotal connection between said hinge arms and said collar section.

4. The combination with a cylindrical machine overarm having a longitudinal axis of, a machine attachment having a laterally disposed mounting face by means of which said attachment may be supported in adjustable positions on said overarm, a supporting bracket including a head wall presenting a swivel seat for mating contact with said mounting face and having two spaced hinge arms forking from said wall in a direction away from said mounting face, said wall containing a bearing bore opening into the space between said hinge arms, a trunnion in fixed relation to said mounting face journaled in said bearing bore, means to prevent separation of said head wall from said swivel seat, means releasably to lock said machine attachment against swiveling movement with said trunnion relative to said supporting bracket, a collar section turnably sleeved on said overarm comprising a hollow block-like body straddled by said hinge arms and connections between said hinge arms and said collar section forming a hinge pivot Whose axis coincides at least at one point with said longitudinal axis of the overarm.

5. In a machine tool of the type including a frame standard higher than its associated work holding table, the combination with said standard of, a work machining unit including an elongated tool shank power driven with respect to its longi tudinal axis while said axis is variously stationed and inclined in relation to work secured on said table in fixed relation to said standard, an overarm supported by said frame standard, and an articulated structure for supporting said machining unit at various stations for operating on said work including at least three support sections, the first of said sections comprising said overarm, the second of said sections comprising a collar turnably sleeved on said overarm, and the third of said sections comprising a yoke straddling and pivotally connected to said collar and coupled adjustably to said machining unit. I

6. In a machine tool as described in claim 5, the combination defined in said claim, together with worm and gear connections between the said yoke and the said machining unit.

7. An adjustably jointed support structure for mounting a portable self-powered work machining unit on a non-rotatable overarm, comprising a collar block having a bore thereby to turnably sleeve on the overarm, and a bracket including a head wall for supporting said machining unit in variable relation to said block and spaced arms rigid with said head wall straddling and pivoted to said collar block to swing relative to the latter about an axis crosswise of the axis of said bore.

8. The combination with a work machining attachment having a mounting face by means of which said attachment may be supported in rotatably adjustable positions of, a supporting bracket including a head wall presenting a swivel seat in mating relation to said mounting face and containing a bearing hole, a trunnion in fixed relation to said mounting face journaled in said bearing hole, means to prevent separation of said mounting face from said swivel seat, and gear connections between said brackets and said trunnion constructed and arranged to cause and control selective degrees of swiveling movement of said mounting face with said trunnion relative to said swivel seat including gear teeth carried by said trunnion and a gear rotatably carried by said supporting bracket.

9. The combination with a Work machining a tachment havin a mounting face by means of which said attachment may be supported in rotata'bly adjustable positions of, a supporting bracket including a head wall presenting a swivel seat in mating relation to said mounting face and containing a bearing hole, a trunnion in fixed relation to said mounting face journaled in said bearing hole, means to prevent separation of said mounting face from said swivel seat, and gear connections between said bracket and said trunnion constructed and arranged to cause and control selective degrees of swiveling movement of said mounting face with said trunnion relative to said swivel seat including gear teeth formed in the surface of said trunnion and a gear in mesh with said teeth rotatably carried by said supporting bracket.

10. The combination with a work machiningattachment having a mounting face by means of which said attachment may be supported in rotatably adjustable positions of, a supporting bracket including a head wall presenting a swivel seat in mating relation to said mounting face and containing a bearing hole, a trunnion in fixed relation to said mounting face journaled in said bearing hole, means to prevent separation of said mounting face from said swivel seat, and gear connections between said bracket and said trunnion constructed and arranged to cause and control selective degrees of swiveling movement of said mounting face with said trunnion relative to said swivel seat including worm Wheel teeth formed in the surface of said trunnion radially within the compass of the journaled surface of the latter, and a worm in mesh with said teeth rotatably carried by said supporting bracket.

RUDOLPH F. BANNOW. 

